Zobrazeno 1 - 10
of 1 669
pro vyhledávání: '"Costas, M. A."'
Autor:
Katsantonis, Ioannis, Manousidaki, Maria, Koulouklidis, Anastasios D., Daskalaki, Christina, Spanos, Ioannis, Kerantzopoulos, Constantinos, Tasolamprou, Anna C., Soukoulis, Costas M., Economou, Eleftherios N., Tzortzakis, Stelios, Farsari, Maria, Kafesaki, Maria
Optical activity (polarization rotation of light) is one of the most desired features of chiral media, as it is important for many polarization related applications. However, in the THz region, chiral media with strong optical activity are not availa
Externí odkaz:
http://arxiv.org/abs/2302.08407
Autor:
Mavidis, Charalampos P., Tasolamprou, Anna C., Economou, Eleftherios N., Soukoulis, Costas M., Kafesaki, Maria
Coated and multicoated cylinder systems constitute an appealing metamaterial category, as they allow a very rich and highly tunable response, resulting from the interplay of the many different geometrical and material parameters involved. Here we der
Externí odkaz:
http://arxiv.org/abs/2302.08227
Autor:
Katsantonis, Ioannis, Droulias, Sotiris, Soukoulis, Costas M., Economou, Eleftherios N., Rakitzis, T. Peter, Kafesaki, Maria
Molecular chirality detection and enantiomer discrimination are very important issues for many areas of science and technology, prompting intensive investigations via optical methods. However, these methods are hindered by the intrinsically weak natu
Externí odkaz:
http://arxiv.org/abs/2112.03747
Autor:
Mavidis, Charalampos P., Tasolamprou, Anna C., Economou, Eleftherios N., Soukoulis, Costas M., Kafesaki, Maria
Publikováno v:
Phys. Rev. B 102, 155310 (2020)
Polaritonic materials, owing to a strong phonon-polariton resonance in the THz and far-infrared parts of the electromagnetic spectrum, offer both high-index dielectric and metallic response in this regime. This complex response makes them suitable ca
Externí odkaz:
http://arxiv.org/abs/2008.05151
Autor:
Katsantonis, Ioannis, Droulias, Sotiris, Soukoulis, Costas M., Economou, Eleftherios N., Kafesaki, Maria
The combination of gain and loss in optical systems that respect parity-time (PT)-symmetry has pointed recently to a variety of novel optical phenomena and possibilities. Many of them can be realized by combining the PT-symmetry concepts with metamat
Externí odkaz:
http://arxiv.org/abs/2004.07235
Autor:
Pitilakis, Alexandros, Tsilipakos, Odysseas, Liu, Fu, Kossifos, Kypros M., Tasolamprou, Anna C., Kwon, Do-Hoon, Mirmoosa, Mohammad Sajjad, Manessis, Dionysios, Kantartzis, Nikolaos V., Liaskos, Christos, Antoniades, Marco A., Georgiou, Julius, Soukoulis, Costas M., Kafesaki, Maria, Tretyakov, Sergei A.
Publikováno v:
IEEE Trans. Antennas Propag., vol. 69, no. 3, pp. 1440-1454, March 2021
In this paper we present the theoretical considerations and the design evolution of a proof-of-concept reconfigurable metasurface, primarily used as a tunable microwave absorber, but also as a wavefront manipulation and polarization conversion device
Externí odkaz:
http://arxiv.org/abs/2003.08654
Autor:
Katsantonis, Ioannis, Droulias, Sotiris, Soukoulis, Costas M., Economou, Eleftherios N., Kafesaki, Maria
Publikováno v:
Phys. Rev. B 101, 214109 (2020)
We investigate the influence of chirality on the PT-symmetric and PT-broken phase of PT-symmetric chiral systems. Starting from the point that transverse magnetic (TM) and transverse electric (TE) waves have different exceptional points, we show that
Externí odkaz:
http://arxiv.org/abs/2003.07882
Autor:
Mavidis, Charalampos P., Tasolamprou, Anna C., Hasan, Shakeeb B., Koschny, Thomas, Economou, Eleftherios N., Kafesaki, Maria, Soukoulis, Costas M., Vos, Willem L.
Publikováno v:
Phys. Rev. B 101, 235309 (2020)
A three-dimensional (3D) photonic band gap crystal is an ideal tool to completely inhibit the local density of optical states (LDOS) at every position in the crystal throughout the band gap. This notion, however, pertains to ideal infinite crystals,
Externí odkaz:
http://arxiv.org/abs/2002.12029
Autor:
Droulias, Sotiris, Katsantonis, Ioannis, Kafesaki, Maria, Soukoulis, Costas M., Economou, Eleftherios N.
Publikováno v:
Phys. Rev. B 100, 205133 (2019)
Optical systems that respect Parity-Time (PT) symmetry can be realized with proper incorporation of gain/loss materials. However, due to the absence of magnetic response at optical frequencies, the wave impedance is defined entirely by their permitti
Externí odkaz:
http://arxiv.org/abs/1908.10745
Autor:
Tasolamprou, Anna C., Koulouklidis, Anastasios D., Daskalaki, Christina, Mavidis, Charalampos P., Kenanakis, George, Deligeorgis, George, Viskadourakis, Zacharias, Kuzhir, Polina, Tzortzakis, Stelios, Economou, Eleftherios N., Kafesaki, Maria, Soukoulis, Costas M.
We present the experimental and theoretical study of an ultrafast graphene based thin film absorption modulator for operation in the THz regime. The flat modulator is composed of a graphene sheet placed on a dielectric layer backed by a metallic back
Externí odkaz:
http://arxiv.org/abs/1908.06696